Climate and Time in Their Geological Relations: A Theory of Secular Changes of the Earth's ClimateD. Appleton, 1875 - 577 páginas |
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Página v
... Considerable portions of the volume have already appeared in substance as separate papers in the Philosophical Magazine and other journals during the past ten or twelve years . The theory , especially in as far as it relates to the ...
... Considerable portions of the volume have already appeared in substance as separate papers in the Philosophical Magazine and other journals during the past ten or twelve years . The theory , especially in as far as it relates to the ...
Página 11
... considerable diversity of climate , and may operate during great periods of time either to mitigate or to exaggerate the difference of winter and summer tempera- tures , so as to produce alternately in the same latitude of either ...
... considerable diversity of climate , and may operate during great periods of time either to mitigate or to exaggerate the difference of winter and summer tempera- tures , so as to produce alternately in the same latitude of either ...
Página 14
... considerable portion of it is devoted to the consideration of objections and difficulties bearing either directly or indirectly on the theory , it will be necessary to point out what those difficulties are , how they rose , and the ...
... considerable portion of it is devoted to the consideration of objections and difficulties bearing either directly or indirectly on the theory , it will be necessary to point out what those difficulties are , how they rose , and the ...
Página 15
... considerable length into the consideration of the effects of ocean currents on the distribution of heat over the globe . The only current of which anything like an accurate estimate of volume and temperature has been made is the Gulf ...
... considerable length into the consideration of the effects of ocean currents on the distribution of heat over the globe . The only current of which anything like an accurate estimate of volume and temperature has been made is the Gulf ...
Página 18
... considerable length , and in Chapter IX . I have entered somewhat minutely into an examination of the mechanics of the gravitation theory . A statement of the wind theory is given in Chapter XIII .; and in Chapter XIV . is shown the ...
... considerable length , and in Chapter IX . I have entered somewhat minutely into an examination of the mechanics of the gravitation theory . A statement of the wind theory is given in Chapter XIII .; and in Chapter XIV . is shown the ...
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Términos y frases comunes
amount of heat antarctic aphelion arctic regions Atlantic beds bottom boulder clay Caithness Carboniferous cause centre of gravity channel coal cold periods condition of climate consequently considerable denudation deposits depth descend earth's orbit eccentricity ecliptic effect Eocene equator evidence existence extent fact feet flow foot-pounds force Geikie Geol geological geologists glacial epoch glacier globe Grangemouth gravel greater Greenland Gulf-stream heat received ice-cap icebergs inter-glacial periods island James Geikie Kilsyth land land-ice latitude lower mass mean melting miles Miocene molecules motion North North Sea northern obliquity ocean ocean-currents perihelion polar column polar regions poles present probably produce Professor quantity of heat radiation regarding result river rocks sand says Scotland sea-bottom sea-level shear Sir Charles Lyell slope snow southern hemisphere specific gravity stones stratified stream striated submergence summer sun's supposed surface theory thickness tion valley warm periods winter
Pasajes populares
Página 331 - ... been removed from the general surface in one year ; and there seems no danger of our overrating the mean rate of waste by selecting the Mississippi as our example, for that river drains a country equal to more than half the continent of Europe, extends through twenty degrees of latitude, and therefore through regions enjoying a great variety of climate, and some of its tributaries descend from mountains of great height. The Mississippi is also more likely to afford us a fair test of ordinary...
Página 535 - Now, the perihelion of the orbit is situated nearly at the place of the northern winter solstice ; so that, were it not for the compensation we have just described, the effect would be to exaggerate the difference of summer and winter in the southern hemisphere, and to moderate it in the northern ; thus producing a more violent alternation of climate in the one hemisphere, and an approach to perpetual spring in the other. As it is, however, no such inequality subsists, but an equal and impartial...